html,body{
    width:100%;
    height: 100%;
    .main {
        width: 100%;
        height: 500px;
        background: url(../imgs/login_bg.png) no-repeat;
    }
    #root .login-form{
        width:360px;
        height: 300px;
        position: absolute;
        right: 100px;
        background: #fff;
        padding:40px 20px;
        border-radius: 8px;
        top:25%;
        border:1px solid rgba(0,0,0,.05);
        box-shadow: 3px 2px 2px rgba(0,0,0,.1);
    }
}